arXiv kit: endorsement is required here, per the 21 Jan 2026 policy change

[Silentpartnercoding]

The kit said "if arXiv requests endorsement". That is no longer the right expectation.

What changed at arXiv

From blog.arxiv.org/2026/01/21/attention-authors-updated-endorsement-policy:

"As of January 21, 2026, arXiv will no longer accept institutional email addresses … as the sole qualifier of endorsement for new authors."

Two paths for a new submitter:

1. institutional email AND previous authorship on an existing arXiv paper in the same endorsement domain — both, not either;
2. personal endorsement from an established arXiv author in that domain.

Path 1 is closed for this submission. It would be the author’s first arXiv paper, so there is no prior cs-domain paper to claim ownership of. An institutional address — including an alumni address — does not change that, because the address was never the whole requirement.

Path 2 is therefore the route, and should be planned for rather than discovered at the form. arXiv states its staff cannot waive the requirement or supply an endorsement.

Also recorded

• The practical way to find an eligible endorser: the "Which authors of this paper are endorsers?" link on any arXiv abstract page. Noted that this paper’s reference list contains no arXiv-hosted work, so the search must go through the cs.LO listings rather than the bibliography.
• Affiliation honesty: associating an institutional address is an identity and contact matter, not a claim of current affiliation. The manuscript asserts no affiliation, which is correct and should stay that way unless one is real.

paper-check passes.

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